I watched the film on VHS in the mid 90’s but it had an 80’s look to it. Was most definitely an indie flick. Was also in color.
An alien thing comes to earth via a meteorite (I believe) I recall it looking like a snake with just a mouth (parana type teeth) It squirms into a nearby village in central America. Climbs into a sleeping woman’s bed and up into her vagina. The creature causes her to have an increased sex drive. When a guy hooks up with her, the creature bites down and kills the guy. I don’t remember the specifics but the creature gained sustanace by killing and grew inside the woman. She thinks she’s killed the thing inside her and starts to hitch hike back home. a bus full of football players picks her up and the the awakens. I’m uncertain of the ending… If it shows her about to do the nasty with the team… Or if she incapacitates the driver and flips the bus to kill the creature.